Tire compressor



April 28, 1942. CASEY 2,281,476

TIRE COMPRESSOR Filed Dec. 16, 1940 INVENTOR ATTORNEYS Patented Apr. 28, 1942 UNITED STATES PATENT OFFICE 'rmn COMPRESSOR Thurman G. Casey, Oakland, Calif.

Application December 16, 1940, Serial No. 370,398

2 Claims.

This invention relates to' a tire compressor and has for an object to provide a tool for eliminating a large amount of time and efiort involved in removing tires from rims.

A further object is to provide a tool comprising essentially a pneumatic piston and cylinder, and a hook carried by the cylinder adapted to embrace the tire, the piston and free end of the hook co-acting in compressing the tire transversely near the beads to dislodge a tire easily and quickly from a rim.

A further object is to provide a device of this character which will be formed of a few strong, simple and durable parts, which will be inexpensive to manufacture, and which will not easily get out of order.

With the above and other objects in view the invention consists of certain novel details of construction and combinations of parts hereinafter fully described and claimed, it being understood that various modifications may be resorted to within the scope of the appended claims without departing from the spirit or sacrificing any of the advantages of the invention.

In the accompanying drawing forming a part of this specification:

. rod. The hook is of sufiicient size to straddle a tire 22 which is to be removed from a rim 23, and dispose the enlarged head 2| in alinement with the enlarged head l8 of the piston rod and on the opposite side of the tire from the piston head.

A lever 24 is pivotally mounted at one end on a lug 25 which is formed integral with the thick cap l2, a pivot pin 28 being passed through the lug and end of the lever. The lever is provided with an opening 21, best shown in Figure 4, which receives a guide pin 28 which is secured to the cap I2. A helical spring 29 is sleeved on the pin between the lever and a head 30 formed on the pin at the secured end thereof. The spring normally tends to urge the lever outwardly against a head 3| on the outer end of the guide pin.

A conical valve 32 is formed on a valve stem 33, which is secured to the lever, and normally Figure 1 is a side elevation of a tire compressor v constructed in accordance with the invention associated with a tire and rim, the latter two v parts being shown in cross section.

Figure 2 is a longitudinal sectional view of the tool with parts removed and parts in elevation.

Figure 3 is a detail perspective view showing the enlarged ends of the plunger and the hook.

Figure 4 is a detail sectional view showing the air intake and exhaust valves of the air cylinder.

Referring now to the drawing in which like characters of reference designate similar parts in the various views, Ill designates an air cylinder provided at the front end with a flanged cap closure II and provided at the rear end with a flanged cap closure |2 which is considerably thickened to provide space for an air duct I3 which extends transversely of the cap and communicates with the cylinder through a duct ll formed axially in the cap.

A piston I5 is disposed in the air cylinder and the piston. rod I3 thereof projects through a guide tube I"! formed on the cap II and terminates in an enlarged head l8, best shown in Figure 3.

An arched hook I9 is rigidly secured at one end to the guide tube l1 and at this end is braced by a short rod 20 which is rigidly secured to the cap H and to the hook and extends paralseats on a seat 34 formed in the adjacent end of the air duct l3. When the lever is in normal position the valve 32 is held open and permits air to exhaust from the air cylinder Ill. When the lever is depressed, the valve is closed to seal the air duct 33 at the seat 34 and permit compressed air to enter the cylinder as will now be described.

A stem 35 is formed integral with the exhaust valve 32 and extends axially through the air duct l3. The stem 35 engages the stem 36 of a conventional tire valve 31 which is disposed in an air tube 38 and which is screw-threadedly engaged in an enlarged portion of the air duct as shown at 39. The air tube may be connected to any suitable source of supply.

In'operation the enlarged head 2| of the hook I9 is engaged against the inside edge of the vehicle wheel and the piston rod head I8 is then engaged against the outside head portion of the tire, and then air is let into the cylinder to move the piston toward the free end of the hook to end of the piston rod, anarched member fixed at its rear end to said guide tube and adapted to straddle a tire, an enlarged head on the free end of the member located oppositev the head of the piston rod, and brace means connected to the member and to the cap. 4

2. The structure as of claim 1 and in which said brace means comprises an arm connected to the arched member and to the cap and extendm ing parallelto the guide tube.

THURMAN G. CASEY. 

